Transmission band



Jan. 20, 1925. 1,523,551

C. W. MANN TRANSMISSION BAND Filed Feb. 2, 1923 z Sheets-Sheet 1 v Fgl.I

Jan. 20, 1925. l 1.523,55?.

' c. w. MANN I TRANSMISSION BAND I Filed Ifema, 192s 2 shank-Sheet 2 4eYigg. 6.

s se o /r as Invenror.

Charles VV. Mann bYa/w/ MMM Ays Patented dan. 20, 1925.

idf F F i C E CHARLES W. MANN, OF METHUEN, MASSACHUSETTS.

TRANSMISSION BAND.

Application filed February 2, 1923. Serial No. 616,594.

To all 'whom t may @0n-cerf Be it known that l, CHARLES WV. MANN, a.citizen of the United States, and a resident of Methuen, county ofEssex, State of Massachusetts, have invented an Improvement inTransmission Bands, of which the followingdescription, in connectionwith the accompanying drawing, is a specification, like characters onthe drawing representing like parts.

This invention relates to brake bands, or transmission bands, for use ina closely confined space such as those bands used in one well-known makeof automobile having planetary transmission, and has particularreference to transmission bands of that type which are provided with aremovable straining ear which can be removed to facilitate theinsert-ion of the band into or its removal from such confined space.

The general object of the invention is to provide a transmission band ofthis type with novel means for securing the removable straining ear tothe body of the band, such means being constructed to firmly andimmovably secure the ear in place while permitting it to be readilydetached.

Another object of the invention is to provide an improved transmissionband of this type which is constructed so that when the band iscontracted to apply braking pressure to a brake drum, such brakingpressure will be evenly distributed throughout the length of the band.

Another object of the invention is to provide a combined handle andlocking washer for holding the nut which bears against the movable earin line with the threaded end of the band tightening rock shaft whilebeing applied to the threaded end of the rock shaft, and for locking thenut in position when it is on the shaft.

The various features wherein the invention resides will be more fullyhereinafter set forth and then pointed out in the appended claims.

The drawings illustrate in perspective and in detail a preferred form ofconstruction adapted for use in a transmission band and embodying thebroad principles of the invention.

ln the drawings:

Fig. l is a side elevation of a transmission band with a removablestraining ear showing the ear slightly removed from the band;

Fig. 2 is a sectional view showing the details of the ear mounted in theband,

\ F ig. 3 is a plan view of the removable ear;

Fig. 4- is a plan view of that portion of the band adapted to receivethe ear;

F ig. 5 is a sectional View showing the transmission bandin place;

F ig. 6 is a sectional View showing a modified form of the removable earand the combined handle and locking means for the nut;

Fig. 7 is a plan view of the modified form of the ear shown in Fig. 6;

Fig. 8 is an end elevation of the nut and supporting member therefor;

Fig. 9 is a section on line 99, Fig. 6.

Only such parts of the device are illustrated as are necessary to showthe manner of connecting the ear to the transmission band, it beingunderstood that a band with a removable ear is not limited in its use totransmissions operating in a closely confined space, but may be used inany instance where it is desirable to have a transmission band separablefrom its associated straining ear.

The device illustrated is particularly adapted to be used in thetransmission of a Ford car, and is so designed that the band, with theear removed, may be inserted through the opening in the top of thetransmission casing, and passed around the brake drum, and then the earattached to the band, thus obtaining the insertion of a new band withoutnecessitating the removal of the entire ripper part of the transmissioncasing.

The transmission band comprises the usual resilient metal band, l,having the lining, 4, that is secured thereto by rivets, o, as usual,said band also having at its ends the two straining ears, 2 and Thestraining ear, 2, may be permanently secured to the metal band, l, butthe straining ear, 3, is removable therefrom and the present inventionrelates in part to the novel means of removably retaining it in place.

In the construction shown in Fig. 2 the band, l, is provided with aplurality of apertures, 6, near one end, which are adapted to receiveprojections, ll, extending inwardly from the ear,3, and said band isalso provided with a boss`r 7, which may be made integral therewith orwelded thereto as desired and which is received in an opening, l5,formed in the ear, rlhe apertures, G, are preferably undercut slightly,as shown llO at 8, and the projections, 11, fit the openings, 6, saidprojections having lips, 12, thereon to engage underneath the undercutportions of the metal band. The projections are preferably formed aslugs fitting tightly in openings, 13, in the curved portions of the ear,and extending through the ear both on the upper and the lower sides. Thelugs are headed over on the upper side of t-he ear as at 14, and extendbelow the lower side of the ear, a distance equal to the width of themetal band. Thus ,the under portions of the lugs lie fiat against and donot form humps in the asbestos lining of the band. The lugs` are alsoheaded over on the under side of the ear, to hold them in place. 'Theheading, however, is only done on the portion of the projection lyingaway from the end of the band, as at 14', the portionofthe heading lyingnearest the end of the band being tapered to form the lip. Theear hasvan aperture, 15, therein to receive the boss, 7, formed o-nthe metalband.

Means are provided for firmly locking the removable strainingear, 3,tothe band and iutheV present embodiment 1 employ ak loclringvscrew,16,for this purpose which has screwfthreaded engagement with the boss, 7,and is arranged to bear against the outer face of the removable ear. lfthe headof the screw is smaller than the aperture, 15, which receivesthe boss, 7, then I will preferablyemploy a washer or its equivalent,17, iteneaththe head of the screw and whiclris of sufficient size tobear against the ear. The

bossand projections, 11, serve to Lhold the ear in place onVth-e bandand the locking screwlocks the ear firmly in place.

The invention I also Acomprehends anchoring means for securing thelocking Vscrew to the earso aste obviate any possibility that said-screwwill become lost, and in the construction illustrated inY Figs. 2 and 3such anchoring device is a strip ofl metal, 18, fastened at one end, 19,under the head of Voneror more of the lugs, and formed integral with thewasher, 17. The locking device, including both the metal strip and thewasher, hasathree distinct functions. First, it holds the screw fromfalling away from the` earnvhen the screw is loosened and removed fromthe boss. Second, by frictionally engaging both the top of the bossandfgthe top ofthe ear it prevents any rela-V tive movement between theboss and the ear, thereby preventing any play betweenV the band anditheear, and third, it retains the ear in position on the band with the lipson the projections on the ear always engaging under the undercutportions of the band, thus preventing the ear from falling away from theband.

Vhenthe ear is to be placed on the bandr it is heldin the position shownin Fig. 1. The ear is then put on the band with the boss on the bandprojectingy through the opening .in .the earJ andthe lugsvon the earprojecting in through the unthreaded openings on the band. The ear isthen'pushed toward the adjacent end ofthe band whereby the` lips on thelugs engage the undercut portions of 'the openings on the band. When the-ea-r and band are in this position the screwfis directly over theopening in the boss and by screwing` the screwv down tightly against theear, or anchoring device, the ear is held fast on the band, the. lugsand lboss preventing any slippage toward theend of theband, and anylateral movement, andthe anchoring device Ypreventing slipping away fromthe end ofthe band whereby the ear might become loosenedy and leave thevband.

TWhen it is desired to remove the ear the.' screw is simply backed outof the threaded boss and, .byfmeans of a blow, the .eanbaclred away fromthe end of the band untilithe lips on the lugs are free from theundercut portions of the band.Y Theearis then 'tree :to be-ren'ioved. Y

Another feature of the invention rela-tes.

to a novel construction by whichwhen the transmission band is contractedto apply braking pressure to the, bra-ke drum such pressure will bedistributed evenlyV throughout the length of the brake liningthu-sobviating undue wear at the end, 20.

The straining ears, 2 and 3,. ofthe tran-s4 mission bands are providedwith the upstanding portions, 9, each being slotted to receive the rockshaft, 22, .toy A.which the brake pedal is secured and with respect. tothe brake band. TheV upstanding portion, 9, of thev ear, 2, restsaga-insta fixed abutment, 23,

`in the housingor casing, 24, while the upstanding portion, 9, oftheear, 3, is engaged by` a nut, 25, screwed onto the rock shaft, 22.`With this construction the tightening of the transmission band to applya braking-pressure on the drums, 26, is Vaccomplished by movement oftheend of the band to. which the ear,r3, is attached and with theconstruc-Vtion formerly used the contracting of the to the rock shaft, 22. One wayoffaccom plishing this is to provide the upstauding portion, 9, of theear, 3, with an aperture through `which the rock shaft, 22, extendsrather than with an open slotv as usual.I Such aperture can convenientlybe made by inserting a'pin, 27, transversely across the lili) lli.)

two arms of the upstanding portion, 9, above the shaft, 22, and withthis construction when the brake band is tightened the engagement of thepin, 27, with the rock shaft, 22, will cause the ear to be moved in adirection parallel to the rock shaft thus distributing the frictionpressure evenly through the length of the brake lining, 4, andpreventing the ear, 3, from being forced downwardly in a radialdirection as well as laterally so as to apply a greater pressure to theend, 20, of the brake lining.

In the modified construction shown in Fig. 6 the removable ear, 28, isprovided with an aperture, 29, to receive the boss, 30, on the band, l,as in the modification shown in F ig. 2, but in this instance theprojection on the ear is formed at the end thereof and is constituted bythe inturned pointed end, 3l, the band having the aperture, 32, toreceive the projection. The edge, 33, of the aperture, 32, is struck upto overlie the pointed end, 3l, of the ear, to assist in holding the earon the band. rlhe boss may be made integral with the band or fixedthereto by any of the known methods of joining metals, as by welding.The means for firmly locking the removable straining ear to the bar inthe modified construction is a locking screw, 34, with a flat head, thescrew being anchored to the straining ear by means of a strip of metal,35, extending transversely of the ear and having bent poriions. whichare turned up over the flat head of the screw to prevent the screw fromhaving movement independently of the ear other than rotary movement. heends of the metal strip are fastened to the sides of the straining earin any manner desired.

In the modification shown in Fig. 6 the locking screw, 34, is located onthe opposite side of the upstanding portion, 9, from that shown in Fig.2, and for this purpose the ear, 28, is provided with an extension, 37,in which the aperture. 29, isformed. The upstanding portion is solidacross the top instead of having the two projecting arms and pin, 27,which are used in the modification shown in Fig. 2. The upstandingportion has the usual opening to permit the end of the band tighteningrock shaft, 22, to pass therethrough and to extend to such a distancebeyond the upstanding portion that the nut, 25, may be placed thereonfor engagement with the upstanding portion. The threaded end of the rockshaft has a groove, 38, cut longitudinally along the shaft for purposesto be hereinafter described.

In order to facilitate applying the nur, 25, to the threaded end of therock shaft and to obviate any danger that the open ator may drop the nutinto the gear casing, 24, I have provided a nut supporting member forsupporting and holding the nut while being applied to the rock shaft.The nut, 25, has a groove, 39, around its periphery to co-operate with asupporting member', 40, by which the nut is held. The supporting memberis formed in one end of a section of strap metal which is bentback onitself at 41 to form a. handle portion having sections` 42 and 43, whichare preferably formed to extend substantially hori- Zontally andparallel t0 the rock shaft, 22. rlhe end, 40, of the section, 42, has anaperture, 44, therethrough and a portion of the wall of the aperture iscut out, as at 45, to form arms, 46 and 47, which compose a yokeoperating in the groove of the nut to permit free turning movement ofthe nur and by means of which the nut may be held in line with thethreaded end of the rock shaft.

The end portion, 43, of the section, 43, has an aperture, 49,therethrough forming an apertured locking washer movable longitudinallyalong the threaded end of the rock shaft and lying intermediate of thenut, 25, and the upstanding portion, 9. A

tongue, 50, extends from the wall of the aperture for projection intoand 3o-operating with the groove, 38, in the threaded end of the rockshaft to prevent rotation of the locking washer.

The nut and washer have relatively yielding interlocking portions actingto lock the nut in position. A convenient way to form the interlockingportions is to form a projection. 51, on the locking washer forengagement with a notch, 52, on that face of the nut which bears againstthe locking washer.

When the ear shown in Fig. 6 is being put on the brake band the pointedend, 32, of the ear is set in the aperture. 28, of the brake band withthe eXtreme end under the turned up edge, 30, of the aperture. Then theear is dropped into place with the aperture, 33, fitting over the boss,34, formed on the band and the locking screw, 35, is screwed down tohold firmly the ear on the band. The threaded end of the rock shaft isthen put through the upstanding portion of the ear and the nut, 25, heldin the combined handle and locking washer, is brought into the postionshown in dotted lines in Fig. 6 with the locking washer on the end ofthe rock shaft and the tongue. 50, projecting into the groove, 3S. Bymeans of a wrench or other tool the nut is screwed on the end of theroclr shaft. The locking washer is prevented from rotating b v means ofthe tongue, 50. engaging with the sides of the groove, 3S, and at everycomplete turn of the nut the interlocking parts of the nut and washercome into locking position so that when the nut is set to the desiredposition the tool may be removed and the nut left in the desiredposition With the as- 'foi-f. registry with theunthreaded openingsurance that; it S will v.notrbeeome inadvertentlyr loosened and`unscrewedfrom the shaft.

It-Will'thusfberseen that, by a relatively simple and? easilyr vformedcontrivance l have `made a combined handleand locking washer Withwhichztheenut which goes on the threaded endy ofu the band tighteningrock shaft may easily be heldinv position while being lapplied to the.rock shaft, and willbe lockedin anyy position to which it is setWhenonthe rockishaft.

Although a particular and preferred form of Athe invention hasy z beendeseribed,

modification may be made, and the-invention is to benconstrued asbroadly asthe limitations .in the claims, takenV in conjunction With'thepriorart, may allow.`

Having `thus describedthe invention7 what zs Claimed as new,` anddesired to be secured ey LettersPatent, is: v

l. In a brake-band of the type comprising a resilientmetal band :havingastraining ear yaft each end, the eoinibination with a bandlhavinganiaperture:and a bossat one'end, o'fa straining ear provided witha projection to enter said aperture andlwith an apertureto receive saidboss, a loeking serew harving screw-threadedI engagex'nent with the bossand operating to removably retainthe Aboss in the aperture ol theerin-.andiineans torisecuringthe screw vto the ear while permittingit tobe screwed into or unscrewed trom thezboss.-

2. In a brake band of the type comprising "a resilient metal band havingafstraining ear at each=end, thecombination with said bandhavinganaperture and a 'boss at oneend, ot a straining ear provided with a pro.-jection to enter saidaperture,` andwithfan alpertureto recei-ve'saidboss, a-loekingi screw having screw-threaded engagementwith the boss,said locking screw operating to retain the bossin 'the aperture-*ottheear, and an anchoring device to anchor the screw to the ear.

3. Ae brake Aband Vtor a planetary ltransmission comprising areSilientImetal band li avinga threaded and an unthreaded Vopening lthe-rein .nearone end, a removable straining ear having va `projection vthereonfplaced theopeninggonf the band, and an opening-,for`

registry with 1 tliefboss, an 1 anchoring 4*de-vice securedfto the ear,axlocking screwcarried bytheanchoring device,:.and adapted to have:

its head exert `torcer aga-inst theeark and its.V

shank p ro-je ct through vthe opening .initiie' ear and screw: into Ythethreaded'boss to retainthe ear Aon` the band.-

.Thefoombinatioin of'. a-z brake band of the typef'eomiprisingayresi-lientr meta-l band,v having at each end arstrainmg ear: providedwith an i upstanding portion,.. a hollowiixed abutment against. whichonevear. engages,`.a-

band tightening. 'roclrshaft passi-ng through thelixedabiitnrentxand.through bot-h ears;

and threadedon the end opposite the abut# ment, amitie-n tlhe threadedend of the rock shaft 1 tov `bear against. the? other ear, a nut Ysuppertin0', mem-benv in, which the nut isV mounted tori free' turningmovement; in either-f direction iandby whichr the nut may!l be held'whileb'eing applied to'the.threadedi'endl .ot the rock. shaft.

6. .The combination` of.' a; br'aliei band ofi thel type. comprising aresihent metal band,

having atl eachl end. :a straining-,ear f provided withan iupstanding...iortion; a vhollowV fixed abutment.against which one ear engages,=V a band ti ghten-ing'- f roch shaft passing `throi-igh the iiXed-abutinentand Ethiroughboth ears.- and threaded on the zend; oppositeto the;

abutment, a-niit on the/threadedvendof the rock shaft tobear;againstqthe other earand -having a `groove around, i its', periphery,

a handle. for holding the nut while beingS applied to the threaded end,o-theroclr. sha-tt,v

saidhandle havinga Vyokefportnm :operating fV 1n the groove oftheinuttopermit-free turn-v ing movement of the nut.- Y.

7. The -combinationolt aY brake band of the type comprising A resilientmetal l.band havingatfeaeh enda` st `iiiing-eir provided withan,upsta-nding-portion, a hollow li'xed abutment againsti which? i oneyea-r I f engages,

a band tigl-rteningroclnsluift .passing through` the lixed 'abutment and.thro-ugh bbtltiears,

and threaded onithe-end opposite to the abutment, .a nut on v'thethreaded end .ofthe rock shaft to bear -againstthe other ear, and havingagroove Varound its periphery, .af-handle havingA a. portion extendingparallel to the rockwshaft fand: -af'short apertured-v portionv 'eX-tending Atransversely ottherock-shaft with the apertureot Iwhich thevgroovein .thennt co-opeiates, to removably retain. the nut in thelaperture, they wall -otf Ithe aperture-.being split toipermiittheinsertiomot the nut' in the aperture.

8. The eombinatiioi'i` of a brake band of thel type comprising aresilient metal band hav*-v ing at each end' a straining eari providedAwith vany upst-andingportion7 ahol'low riXed abutn'ient .Y againstwhich. 'one ear engages, a band tightening rock shaft passingthrough theiixed abutmentand through. both ears, threaded on the fendf opppsitetheabutment,

and having av longitudinal groove along said threaded end, a nut on thethreaded end ot the rook shaft to bear against the other oar, with anotch on the 'face of the nut hearing against the ear, a section otstrap metal hent back on itself to forni a handle portion extendingparallel to the rock sha-tt, the ends being bent to torni two shortapertured portions extending transversely ot' the roelr shaft, one endhaving its aperture eo-oper ating with the groove in the nut, tomovahl),v retain the nut in the aperture, and having the side ot theaperture split to permit insertion of the nut in the aperture, and theother end toi-ming an apertured look Washer niovahlo longitudinally7along the shaft, and located intermediate ot' the nut and ear,

ith a projection 'for eiigageinent With the notch on the nut, acting tolook the nut in position, and tongue projecting from the side ot theaperture and oo-operating with the groove of the shaft for preventingrevolution of the washer with the nut.

ln testimony whereof, I have signed iny naine to this specilioation,

CHARLES lV. MANN.

